Summary: quicksand layer appears in the sinking and driving engineering will give well engineering excavation work caused a certain degree of interference, which can even lead to security incidents.
The proper earthing of the shielded layer of cable in HV substation plays an important part in reducing electromagnetic interference to the microcomputer-based secondary facilities.
高压变电所内屏蔽电缆屏蔽层的正确接地，对降低外部电磁场对微机型二次设备的干扰水平，起着重要作用。
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The Paper deduces the calculating formula for interference force between hoisting ropes in double-layer winding and gives the calculating results of an example.